PLEASE HELP!!! I WILL RATE!!! THANK YOU!!! A ball is thrown upwards with speed v

Question

PLEASE HELP!!! I WILL RATE!!! THANK YOU!!! A ball is thrown upwards with speed v0. The ball has net charge Q and travels in the presence of an electric field whose potential function is U = (k/2) y2. Positive y is taken as vertically up. Do not neglect gravity.
a.) Compute the electric field components.
b.) Compute the net force on the ball.
c.) How high does the ball go?

Hint: Use energy conservation.
Note: Assume y0 = 0 and vy (0) = v0y. PLEASE HELP!!! I WILL RATE!!! THANK YOU!!! A ball is thrown upwards with speed v0. The ball has net charge Q and travels in the presence of an electric field whose potential function is U = (k/2) y2. Positive y is taken as vertically up. Do not neglect gravity. Note: Assume y0 = 0 and vy (0) = v0y.

Explanation / Answer

c) to find height , apply conservation of energy, initially energy= 1/2 m v^2 + k/2 * 0* Q    =1/2 m v^2 when it reaches the top most point,let it be h energy= mgh + k/2 * h^2*Q mgh + k/2 * h^2 * Q =1/2 m v^2 it is quadratic eq. in h, solve and find h, mgh + k/2 * h^2 * Q =1/2 m v^2 neglect -ve h

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